Aerosol bomb



' W. RAEHS AEROSOL BOMB Nov. 21, 1961 Filed May 5, 1968 IN VEN TOR.

United States Patent Ofiice 3,009,602 Patented Nov. 21, 196 1 V AEROSOLBOMB Wilhelm Raehs, Stolberg, Rhineland, Germany, assignor to ConsiliaFidnciaire, Basel, Switzerland Filed May 5, 1958, Ser. No. 733,084

'2 Claims. (Cl. 220-67) The present invention relates to a container,preferably in form of a can, for receiving aerosols.

It is known to make aerosol cans or aerosol bombs from deep drawn steelor aluminum sheet metal. When employing steel sheet metal, it is knownto solder or weld the hull of the cans in overlapped condition. Thesemetallic cans or'bombs have the drawback that they are subject tocorrosion by their contents; Due to this drawback, glass bottles havebeen employed as. aerosol bombs which, however, have. the drawback thatthey break easily. In .an'eiiort to overcome this drawback, such glassbottles have been covered by a protective layer of polyvinyl chloride.layer was not sufficient protection against the easy breakage of theglass bottle.

Recently, also blown synthetic aerosol bottles and bottles of melamineresin have been employed. These bottles have the drawback that the wallthickness cannot be dimensioned expediently and so as to save material,while the bottom of such bottles cannot be welded absolutely tight. Inaddition thereto, melamine resin bottles cannot be deformed.

Inasmuch as generally aerosol bombs are articles of mass production, itis, therefore, an object of the present invention to provide an aerosolcontainer which can be produced with as thin a wall as possible butwhich will not break when being roughly handled or dropped.

It is another object of this invention to provide an aerosol containerof the type set forth in the preceding paragraph, which can be sealedabsolutely tight.

It is still another object of this invention to provide an aerosolcontainer of non-breakable material, which after production of thecontainer proper can still be deformed to such an extent as to allow theinsertion and the securing of a valve body in said container.

These and other objects and advantages of the invention will appear moreclearly from the following specification in connection with theaccompanying drawings, in which:

FIG. 1 is a section through a container according to the presentinvention, the neck of which is provided with a metal cap and the bottomof which is connected with the hull by means of a genuine fold.

FIG. 2 illustrates the fold at the bottom of the can of FIG. 1 but on anenlarged scale over the latter.

FIG. 3 illustrates in section the container neck with inserted valve ofFIG. 1 but on a larger scale than the latter.

FIG. 4 is a section on an enlarged scale of the Wedgeshaped contour ofthat portion of the synthetic container hull which is folded into thebottom portion of the container.

FIG. 5 illustrates partly in section and partly in view an aerosol bombthe hull of which is integral with a valve sleeve.

General arrangement The container or aerosol bomb according to thepresent invention is characterized primarily in that the container hullis made of synthetic material and is connected to a metallic bottom by agenuine fold. By genuine fold is to be understood a fold in which thatportion of the metallic bottom, which is to be united with the hull byfolding, is formed by an approximately -U-shaped marginal portion of thebottom, while one leg ofsaid U-shaped marginal portion of the bottomextends between the outer However, it was found that such protective 2wall of the container hull and the upwardly bent marginal portion orflange at the lower end of the container hull.

Structural arrangement Referring now to the drawings in detail, thecontainer hull 1 may be of any convenient shape, for instance of aconical shape as shown in FIG. 1, a cylindrical shape or may have acylindrical portion 1a (see FIG. 5) and a conical portion 1b. The lowermarginal portion of the hull 1 is connected to a metallic bottom 2 by agenuine fold as is particularly clearly shown in FIG. 2. As will be seenfrom this figure, the lower marginal portion of hull 1 has an upwardlybent section or flange 4 which is embraced by a fold formed by themarginal portion of the bottom 2 and comprising the legs 5, 6 and theportions 6a and 6b forming so to speak an extension of the leg 6. Theportion 6b extends between the flange 4 and the outer wall 7 of hull I.I v

A particularly good seal by the fold is obtained if the lower marginalportion or flanged portion of the container hull, which extends into thefold is designed in a wedge-shaped manner as is illustrated in FIG. 4.According to the arrangement of FIG. 4, the flange 40 is wedge-shaped insuch a way that it has its greatest thickness at approximately the edge40a, whereas the lower portion of the flange 40 has a thicknessapproximating the thickness of the container hull. As will be obviousfrom FIG. 4, the wedge-shaped flange 40 pulls itself into the fold whenthe bottom 2 is put under load. As a result thereof, as has been provedby numerous tests, the sealing effect is still further increased.

The synthetic hull of the container is provided with a neck 8 (FIG. 3)which latter may be provided with an inwardly extending annular flange9. A metal sleeve 10 is mounted over said flange 9 and neck 8. The metalsleeve it} is nicked or bent inwardly at 11 thereby forming a bead 12protruding inwardly into the interior of the container. This beadsecures a valve 13 in its position. Instead of providing the metalsleeve or cap 10 with a nick 11, it is, of course, also possible to rollin the metal cap 10 to provide the seat for the valve 13. The sleeve orcap '10 forms a valuable reinforcement for the syn-v thetic neck so thata pressure exerted upon the valve for actuating the latter will notdeform the neck 8 of the container.

According to a further embodiment of the invention, the upper end of thesynthetic hull may form the sleeve of a valve so that said valve sleevewill be integral with the synthetic hull of the container. Such anarrangement is shown in FIG. 5. As will be evident from this figure, theupper end of the synthetic hull comprises a web 14 merging with a sleeve15 for the valve. This sleeve holds a valve stem 16, the lower end ofwhich forms the valve head or valve cone 17. The valve stem 16 is heldin said sleeve 15 by means of one or more dogs. If the valve sleeve isbent or edged laterally, which is facilitated by the notch or recess15a, the conical surface of the valve head 17 will be spaced from itsseat 19 thereby allowing aerosol under pressure to escape through sleeve15.

In order to prevent an accidental edging or bending ofvalve sleeve 15,the container may be provided with a cap 20 having extensions 21 withsmall bores through which a wire or thread may be threaded and passedthrough corresponding bores of an extension 22 on the a The syntheticlayer "23 on the metallic bottom may consist for instance of polyamid.

It is, of course, to be understood that the present invention is, by nomeans, limited to the particular construction shown in the drawings butalso comprises any modifications within the scope of the appendedclaims.

What I claim is:

1. A container for receiving aerosols, which comprises: a hull ofsynthetic material, and a metallic bottom tightly connected to saidhull, said hull having its end portion adjacent said bottom bentoutwardly so as to form an annular trough, and said bottom having amarginal portion of substantially U-shaped cross section with an innerleg and an outer leg, said inner leg closely and firmly engaging theinner surface of the adjacent end of said hull, said outer leg extendingaround and into said marginal trough while closely and firmly engagingat least the outside of the outer wall of said trough thereby formingwith said trough a genuine fold tightly interconnecting said bottom andsaid hull.

2. A container for receiving aerosols, which comprises: a hull ofsynthetic material, and a metallic bottom tightly connected to saidhull, said hull having its end portion adjacent said bottom bentoutwardly so as to form an annular trough, the outwardly bent portion ofsaid annular trough being wedge-shaped so as to taper in the directiontoward the bottom of said annular trough, and said bottom having amarginal portion of substantially U-shaped cross section with an innerleg and an outer leg, said inner leg closely and firmly engaging theinner surface, of the adjacent end of said hull and said outer legextending around and into said marginal trough thereby forming with saidtrough while closely and firmly engaging at least the outside of theouter wall of said trough a genuine fold tightly interconnecting saidbottom and said hull.

References Cited in the file of this patent UNITED STATES PATENTS1,108,376 Lannoye Aug. 25, 1914 2,701,163 Teller et al Feb. 1, 19552,753,088 Prahl July 3, 1956 2,835,418 Manetti May 20, 1958 2,858,053Waldherr Oct. 28, 1958 2,917,197 Glover et al Dec. 15, 1959

